2018 MX-13 T880 oil pressure and temperature issue

My Brother purchased a 2018-19 T880 with a 40 ton crane mounted on it. It weighs 62K total. It has the Digital dashboard with oil pressure , temp and other features. It was purchased new and driven a few hundred miles to have the crane mounted. Then driven from Texas to Florida.

Paccar Mx-13 455/1650 10speed manual

The concern is the oil temp will go to 230* just driving down the highway on a 60* or 85* night. When the oil is that hot it also only makes 45psi at 1500rpm. That oil pressure seems to be low . I realize that as oil heats up pressure will go down to a certain extent.

Coolant temp is steady at 190 * . It doesn't cycle the cooling fan on the highway so to me its not overheating or working too hard. It was driven on flat roads. It also gets to 230* oil temp in city driving.

I could understand it working hard if it had a large bed that didn't go thru the air well . Like a 70yd Grapple truck . But its not.

Paccar says that oil temp is fine since its measured pre cooler. I don't know why they would measure it there instead of the oil pan . IIRC everyone in the automotive industry measures it from the pan.

Has anyone else with the digital dash measured their oil temp/pressure.

What are your pressures?

Any ideas ? Thank you

 

Thank you very much guys.